Table 2. Pearson’s correlations of identified metabolites (variable importance in the projection value of > 1) from saliva samples for the boars

	Acetate	Alanine	Choline	Citrate	Formate	Glucose	Glutamate	Isoleucine	Lactate	Leucine	Phosphocholine	Pimelate	Propionate	Trimethylamine N-oxide	Valine
Acetate		−0.88	−1.00 (p = 0.061)	−0.93	0.90	−0.88	−0.83	−0.94	−0.99	−0.99	−0.97	−0.90	−1.00*	−0.96	−0.98
Alanine			0.92	0.64	−1.00*	1.00**	1.00 (p = 0.06)	0.68	0.95	0.81	0.75	1.00*	0.90	0.98	0.77
Choline				0.89	−0.94	0.92	0.88	0.91	1.00*	0.97	0.95	0.94	1.00*	0.98	0.96
Citrate					−0.68	0.63	0.57	1.00*	0.85	0.97	0.99	0.68	0.91	0.79	0.98
Formate						−1.00*	−0.99	−0.71	−0.96	−0.83	−0.78	−1.00**	−0.92	−0.99	−0.80
Glucose							1.00*	0.67	0.94	0.80	0.74	1.00*	0.90	0.97	0.77
Glutamate								0.61	0.91	0.75	0.68	0.99	0.86	0.95	0.71
Isoleucine									0.88	0.98	0.99 (p = 0.064)	0.71	0.93	0.82	0.99
Lactate										0.95	0.92	0.96	0.99	0.99	0.94
Leucine											1.00 (p = 0.058)	0.83	0.98	0.91	1.00*
Phosphocholine												0.78	0.96	0.87	1.00*
Pimelate													0.92	0.99	0.80
Propionate														0.97	0.97
Trimethylamine N-oxide															0.89
Valine

p < 0.05,
p < 0.01.